Hey Mike,
Thanx for the kind words. After 3 high energy hours at a jumpin' South Jersey Casino tonight, I am convinced that the TC harmonizer with the RIGHT mic is worlds ahead of the VH2 that Yamaha puts out. I had more fun tonight than I have had in years ... Diana Krall even sat in!
(well, not really - but she sure does LOOK like her!)
The best thing Korg could have done to this kb would be to use an XLR mic input - t would make everyone sound good right out of the box.
TC developed the technology, buy Korg builds the units themselves, and they told me that the 900 does, indeed have a similar unit to the 800.
Could be better, but it's still WAY usable.